Why the fuck would you ever enter that kind of information into your phone? Did they ever make any promises about it all being end-to-end encrypted?

Are the owners of the app based in a privacy friendly country? What kind of things do they require for passwords?

Worse than betterhelp right there. people that use services like those are fucking sheep.

Period’s are awful to keep track of yourself, it’s not a perfect, “every 4 weeks for 5 days” thing. Those apps actually recalculate the beginning and end of a period when something abnormal happens, like stress moving the period back a few days. This way you don’t need to keep it in a personal calendar, which mind you, a lot of people don’t even have.

Btw, most apps do also more than just regular tracking, they can predict how bad blod flow will be, and if your periods are known to be rather painful, they can keep track and remind you when a day comes on which you’d need to pack a few extra painkillers.